{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{2}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}\\
                    &\multicolumn{1}{c}{Attriter}&\multicolumn{1}{c}{Attriter}\\
\midrule
Assigned to any DW  &      -0.045         &                     \\
                    &     [0.045]         &                     \\
\addlinespace
Assigned to homogeneous DW&                     &      -0.007         \\
                    &                     &     [0.071]         \\
\addlinespace
Assigned to mixed DW&                     &       0.009         \\
                    &                     &     [0.074]         \\
\midrule
Observations        &         492         &         295         \\
\bottomrule
\end{tabular}
}
